<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>socket</title>
</head>
<body>


<script>
    // 高级api 不兼容socket.io (一般使用它)
    let socket= new WebSocket("ws://localhost:3000");
    socket.onopen=function () {
        socket.send("我是fal")//往服务端发送信息
    }
    // 接收服务端回复
    socket.onmessage=function (e) {
        console.log(e.data)
    }



</script>


</body>
</html>